Apparatus for lowering or lifting boats.



No. 65l,63|. Patented June 12, I900.

J. H. KLENCKE.

APPARATUS FOR LUWERING ORLIFTING BOATS.

(Application filed Dec. 5, 1898.) qNo Model.) 2 Sheets-Sheet l.

No. 65|,63l. Pafented lunel2; I900. J. H. KLENCKE.

APPARATUS FOR LOWERING 0R LIFTING BOATS.

(Application filed Dec. 5, 189B.\

2 Sheets-Sheet 2.

(No Model.)

I L I L n r cams ranks on mo'ro-uwu, wAs

UNITED STATES A'rmwr FFICE.

JOHANN HEINRICH KLENOKE, ()F BREMEN, GERMANY.

APPARATUS FOR LOWERING OR LIFTING BOATS.

SPECIFICATION forming part of Letters Patent No. 651,631, dated June 12, 1900.

Application filed December 5, 1893. Serial No. 698,404. (No model.)

To all whom it 7771(61/ concern:

Be it known that I, J OHANN HEINRICH KLENCKE, captain, a citizen of the German Empire, residing at Bremen, Germany, have invented certain new and useful Improvements in Apparatus for Lifting or Lowering Boats and the Like, of which the following is a full and complete specification, such as will enable those skilled in the art to which it appertains to make and use the same.

The invention relates to apparatus for lowering and lifting ships boats and other loads, and has for its purpose to get a greater security in lifting and lowering boats and the like and to obtain a more equal lowering and an instantaneous releasing of the load in such a manner that these operations are executed by mechanical arrangements and independent of the ability of the crew.

In the accompanying.drawings, Figure 1 shows the apparatus in front elevation. Fig. 2 is a side elevation, and Fig. 3 is a section through the braking apparatus.

As shown on the drawings, the hithertoemployed luifs are replaced by Winches.

The winch shown on the drawings consists of the drum a in the framing b, which is fixed to the davit D, and of mechanism for actuating the drum.

0 is the crank, turning by the geared wheels (1 e f, the toothed Wheel 9 sitting loose on the drum-shaft h. To the wheel g are attached three arms 11, catching into recesses 70 of the screw-nut Z. A screw m, mounted loose on the shaft h, is threaded through the nut Z. The screw is solid with the ratchet-Wheel n, which is held in position by the pawl q. A friction-disk o is rigidly fixed on the shaft. A second movable friction-disk p sits loose on the boss of the disk 0 and is held in its position by the three levers 2', connected to the wheel g and fitting into notches of the disk. On the crank-shaft 'r is also fixed a centrifugal brake s, of any ordinary construction, put into action by turning the crank slightly backward. v

The apparatus works in the following manner: If a boat is to be lifted, the necessary pressure between the friction-disks o and p is produced by turning the, ratchet-wheel n by means of a lever inserted into holes w of the ratchet-wheel. Afterward the toothed wheels (I e f g are moved by turning the crank c on the shaft 4'. By the arms 2', attached to g, the nut Z is turned also, and the frictiondisk 1) is further pressed against the disk 0. Thus the shaft /2, with the drum a, is turned, the rope is wound onto the drum, and the boat A will be lifted. By a backward pressure on the crank e the weightfor instance, the boat A-will be lowered ata speed equally regulated by the centrifugal brake, while the pawl q is not engaged in the ratchet-wheel 92.. As soon as the boat has arrived near the water the pawl q is inserted into the ratchet-,

wheel 72. Then the pressure of the descending weight turns the nut Z on the screw m backward, the friction-disk o is released, and the toothed wheel 9, with gearing and centrifugal brake, is put out of activity, and the drum, with shaft h, is turning alone. rope is wound off from the drum by the weight, and the boat arrives at the water, whereby the rope may be detached automatically from the drum.

Commonly the boats are hanging 011 two such winches, and their pawls may be fixed on a'shaft extending over the deck, so that the pawls can be inserted simultaneously by a lever fixed on the shaft, thus enabling the boat to be set free at both ends at the same time. At the side of the ratchet-wheel n a second ratchet-wheel z, with teeth in the opposite direction, may be placed, as indicated by dotted lines on Fig. 1. This wheel also does not serve to arrest the lifted weight, but for the purpose of restoring the pressure of the sliding friction-disk 13 against the fixed disk 0. This is done by turning the crank in the direction for lifting the Weight after having inserted a pawl into the teeth of the second ra tchet-wheel z until the pressure thus produced makes a further turning of the crank impossible. A pressure on the crank in a backward direction and a slight pull on the winding-rope allow the disengagement of the second pawl, whereby the winch is made ready for the safe lifting of a boat.

Instead of lifting the boat by means of the crank this may be done by hand chain-wheels t and u, fastened on the crank-shaft 0". For winding on a new or the used rope a chainwheel 1; is fixed on the drum-shaft. These chain-wheels are worked by a crew on the The.

lower deck underneath the boat-deck. The rope is conducted over the guide-pulleys w y of the davits D.

Having described my invention and set forth its merits, What I claim is 1. In an apparatus for raising and lowering boats and other bodies, the combination with a winch, a rope and a train of gears, of a friction-clutch one member of which is fixed to the shaft of the winch and the other members loosely mounted, a loose gear which engages one of the wheels of the train of gearing, and means connecting said loose gear with the loose member of the friction-clutch and adapted to move into clutching engagement the two members of the clutch, substantially as described.

2. In an apparatus for raising and lowering boats and other bodies, the combination with a winch, a rope and a train of gears, of a friction-clutch one member of which is fixed to the shaft of the winch and the other member is loosely mounted, a loose gear-wheel engaging one of the wheels of the train of gearing, a screw loosely mounted on the winchshaft, a nut to said screw, means connecting the loose gear, theloose member of the clutch, and said nut, and means for locking and unlocking the screw, whereby the parts are adapted to operate substantially as described a to render the clutch active in lifting the body and inactive in lowering the body, substantially as described.

3. In an apparatus for raising and lowering boats and other bodies, the combination with a winch, a rope and a train of gears, of a friction-clutch one member of which is fixed to the shaft of the winch and the other mem her is loosely mounted, a screw mounted loosely on the winch-shaft and having a ratchet connected with it, a pawl to engage the ratchet, a nut mounted on the screw, a loose gear-wheel engaging one of the wheels of the train of gearing, and means connecting the loose gear, the loose member of the clutch and the nut, substantially as described.

4:. In an apparatus for raising and lowering boats and other bodies, the combination with a winch and a train of gears, of a friction-clutch consisting of a fixed and a looselymounted member one of which members has connection with a part of the winch, the loose gear wheel engaging one of the Wheels of the train of gears, the loosely-mounted screw, the

a nut on the screw, means connecting the loose 

